The Castle of San Nicola de Thoro Plano sits on the summit of the hill that overlooks the districts of Accola and Carpineto. It was more than just a castle, it was a fortress, a bastion, a place of refuge for the population of the town below against Longobard and pirate attacks.
According to Cerasuoli, building began after the death of Sicardo, Longobard Duke of Benevento in 840 AD. Sicardo had devestated many of the towns and settlements on the Amalfi Coast.Work on the building developed round an existing church dedicated to San Nicola de Thoro Plano. The building underwent modifications by the Piccolimini Dukes, who in 1461 had been nominated as governors of the Duchy of Amalfi by Ferdinando I of Aragon.
The work started in 1465 and lasted until 1468 at a cost to the town of 6000 ducats. The fort enclosed an existing three aisle church, and the term Thoro Plano means a small hill placed against a taller elevation, Thorus Clivius, where the districts of Campo and Paie were situated.Inside the castle there were barracks, refuge for the population, cisterns and stores which guaranteed water and food supplies in case of invasion. The building preserves its original rectangular polygon shaped perimeter which is 550 metres long. The barrier walls are interspaced with nine round towers, which are eight metres high and five metres in diameter.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.